the three 1/3 statistics

I am troubled by this 3 statistic I learn recently

1) According to a report by UN that 1/3 women in the world have been violently or sexually abused at least one point in their life.

2) 1/3 (up from 1/4 previously) of Malaysia population will eventually be diagnosed of cancer

3) George Barna reported that 1/3 kids 8 to 12 years want to spend more time with their parents